/Engine/Source/Editor/AnimationBlueprintLibrary/Public/AnimationBlueprintLibrary.h
Adds a Virtual Bone between the Source and Target Bones to the given Animation Sequence
static void AddVirtualBone ( const [UAnimSequence](API\Runtime\Engine\Animation\UAnimSequence) * AnimationSequence, [FName](API\Runtime\Core\UObject\FName) SourceBoneName, [FName](API\Runtime\Core\UObject\FName) TargetBoneName, [FName](API\Runtime\Core\UObject\FName) & VirtualBoneName )